/*
 * Software License Agreement (BSD License)
 *
 *  Copyright (c) 2011, Willow Garage, Inc.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Willow Garage, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 * @author: Cedric Cagniart, Koen Buys
 */

#include <libBVH/BVHMotionFile.h>
#include <fstream>
#include <stdexcept>
#include <sstream>


namespace pcl
{
namespace people
{
namespace BVH
{

BVHMotionFile::BVHMotionFile(const std::string &filename)
{
  std::ifstream *finptr = new std::ifstream(filename.c_str());
  if (!finptr->is_open())
  {
    delete finptr;
    throw (std::runtime_error(std::string("(E)could not open: ") + std::string(filename)));
  }

  mPriv = finptr;
}



BVHMotionFile::~BVHMotionFile()
{
  std::ifstream *finptr = static_cast<std::ifstream *>(mPriv);
  delete finptr;
}



bool BVHMotionFile::readNextFrame(const std::vector<bvhJoint> &joints,
                                  std::vector<float>          &values)
{
  // recast private imp detail to real type
  std::ifstream *finptr = static_cast<std::ifstream *>(mPriv);

  // prepare to read
  int numJoints = joints.size();
  int paramSize = 0;
  for (int ji = 0; ji < numJoints; ++ji)
  {
    paramSize += bvhChannelSize[ joints[ji].ctype ];
  }

  // resize
  values.resize(paramSize);


  std::string line;
  getline(*finptr, line);
  std::istringstream iss(line);
  // read in
  for (int vi = 0; vi < paramSize; ++vi)
  {
    iss >> values[vi];
  }

  if (iss.fail())
  {
    return false;
  }
  return true;
}





}
}
}// end namespace BVH


